Pencil sharpener



H. J. HASSENFELD PENCL SHARPENER Filed March 11, 1925 Sept., 28 1926.

Patented sept. 2s, 1926.

UNITED STATES rfi Y EE.

PENCIL SI-IABJPENER.

i Application filed March 11, 1925. Serial No. 14,634.

My invention relates to pencil sharpeners of that type which comprises a conical sharpening socket and is rotatable by the interengaging thumb and finger of the operator.

The essential objects of my invention is to avoid in the construction of my device the necessity of employing solder, electric welding, or screws, and thus secure a maximum of strength at a-minimum cost.

To the above enumerated ends essentially, but not exclusively, my invention consists in such parts and in such combinations of parts as fall within the scope of the appended claim.

In the accompanying drawings which form a part of' this specification Figure `1 is a side elevation of a Sharpener embodying my invention,

Figure 2, a similar elevation of the Same taken at an angle of 95 degrees from the showing in Figure 1, and

Figures 3 and 11, sections on line 3 3 and 4 4 respectively of Figure 1.

Like reference characters indicate like parts throughoutthe views.

My device rcomprises a tubular member or body 6, integral with which is a conical socket or head 7 provided with a longitudinal slot 8 upon one of whose edges is formed a lateral tongue 9 provided upon its top and bottom with lugs 10. A knife blade 13 rests upon the tongue and its beveled lateral edge 14 extends into the slot 8. The blade. is provided with rectangular cavities 15 in its top and bottom edges. The lugs 10` are bent and 85 forced by swaging or otherwise into the cavities 15 where they are tightly held by friction. Y

It will be observed that the described construction permits the formation of the parts 0 from initially fiat metallic blanks. Further that the attachment of the blade by interlocking integral lugs not only insures a permanent and firm engagement of the blade, but avoids the expensive use of screws and the costly process of welding.

I claim As an improved article of manufacture a pencil Sharpener composed of two elements only, a tubular body and a knife blade, the body being formed with a tubular socket with longitudinal slot and an integral lateral ltongue at one edge of the slot and provided at each end ywith a bendable lug, the lugs being bent to form knife blade engaging members to form a passage for the insertion of the knife blade, and a knife blade insertible in a plane parallel with said flange to rest thereupon and having cavities at its ends into which the said lugs are bent, the blade extended with its sharpened edge out of parallelism with the walls of the saidvslot. Y

In testimony whereof I have aiiixed my signature.

HENRY J. HASSENFEDD. 

